This is a kingdom hearts wallpaper and this is my first.
please tell me what you think...

Hmm...I think it's kinda dull on the right...but maybe that's your main idea...
You can still notice the small pixels on Sora(the coloured one), try making it look smoother and there are some funny lines on the fish bone too...try getting rid of that also...
Well, overall it is a fine walll...
Keep up the good work!

Well done so far. In addition to Kev's suggestions, you'll also want to clean up the extraction of the KH logo. Remove the white border around the logo. You'll also need your signature somwhere at the bottom. Good luck!

First, note at first sight that is totally pixels o.o you would be due to put the two last images (Sora and the logo) less pixels, than I didn't notice that you have trimmed it xP badly single that, returns to try it, surely that leaves to you better, I animate!

Major quality problem. >_< the scan you used is faded and artifacted. you need to either vector it or else find a higher quality image. remember that AP is "driven on quality"! and you need to work on your extraction too, because you seem to have left a border of whitish pixels around him. everything right up against the outline from the original background must be gotten rid of.

the logo is the only saturated/colorful part of the wall. not good. goes to show that you need something more in the rest of the wall. anyway, the extraction for the logo needs to be redone. you can't have white jaggy pixels ;P. so i suggest you only keep the main text and cut out the small black text.

as well, having some more pictures in the bg doesn't make for a very creative/good bg. a wall is composed of a foreground scan, some text maybe, and a background design...having more scans won't do at all. you'll have to come up with something else and make it yourself to show originality.

sz is here to help so good luck and don't get discouraged. ^^